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JUCS - Journal of Universal Computer Science 18(17): 2407-2431
doi:
10.3217/jucs-018-17-2407
Received:
16 Jan 2011 | Approved:
29 Aug 2012 | Published:
01 Sep 2012
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Authors
Jose Ignacio Fernández-Villamor 
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Universidad Politécnica de Madrid, Madrid, Spain
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Universidad Politécnica de Madrid, Madrid, Spain
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Universidad Politécnica de Madrid, Madrid, Spain
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Conflict of interest
The authors have declared that no competing interests exist.
This article is freely available under the J.UCS Open Content License.